A density measuring device for liquids in single-hole devices or lines

Abstract

The utility model discloses a kind of density measuring devices suitable for liquid in single-hole equipment or pipeline, including the flange pressure-tapping element being arranged at single-hole equipment or horizontal pipeline flange, two groups of transmission pressure's isolated container, two groups of corrosive medium connecting pipeline for connecting flange pressure-tapping element and isolated container, two groups of non-corrosive medium connecting pipeline for connecting two groups of isolated container and differential pressure transmitter, valve assembly is equipped on non-corrosive medium connecting pipeline, each group of isolated container is equipped with corrosive medium solution and isolated liquid by different specific gravity and realizes upper and lower layering, the upper portion and the lower portion of each group of isolated container are equipped with communicating tube respectively, the communicating tube of upper and lower portion is respectively communicated corrosive medium solution or isolated liquid with one end, and the other end is communicated with corrosive medium connecting pipeline or non-corrosive medium connecting pipeline.The utility model device realizes the density measurement of single-hole equipment or horizontal pipeline, can replace the instrument using special material liquid connection measurement, greatly reduce measurement cost.

Description

Technical Field

[0001] This utility model belongs to the field of liquid density measurement technology, specifically relating to a density measuring device suitable for liquids in single-hole equipment or pipelines. Background Technology

[0002] The high-precision quality differences of chemical products often require judgment based on the concentration of the medium, or corresponding adjustments and controls. Currently, commonly used measurement methods include: inductive conductivity meters, tuning fork densitometers, and Coriolis mass flow meters. However, these measurement methods face the following problems: 1) The installation location and dimensions of the instrument are limited; 2) To meet the requirements of the medium's corrosion resistance, the instrument's wetted parts must be made of appropriate special materials; 3) Measurement accuracy is affected by parameters such as the flow field distribution and viscosity of the medium; 4) The instruments are expensive and the enclosure costs are high.

[0003] The average density of the medium in a given area can be obtained by measuring differential pressure at a fixed height. The density can then be converted to concentration based on the relationship between density and concentration. However, this method is suitable for equipment with multiple pores, but not for density measurement of single-pore equipment or horizontal pipes. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a liquid density measuring device suitable for single-hole equipment or pipelines.

[0005] The specific technical solution is as follows: A density measuring device for liquids in single-hole equipment or pipelines includes a flange pressure tapping element installed at the flange of the single-hole equipment or horizontal pipeline, two sets of pressure-transmitting isolation containers, two sets of corrosive medium connection pipelines for connecting the flange pressure tapping element and one end of the two sets of isolation containers, and two sets of non-corrosive medium connection pipelines for connecting the other end of the two sets of isolation containers to the same differential pressure transmitter. The non-corrosive medium connection pipelines are equipped with valve assemblies. Each set of isolation containers contains a corrosive medium solution and an isolation liquid that are separated into upper and lower layers by their different specific gravities. Each set of isolation containers has connecting pipes at the upper and lower parts, with one end of the upper and lower connecting pipes connected to the corrosive medium solution or the isolation liquid, and the other end connected to the corrosive medium connection pipeline or the non-corrosive medium connection pipeline.

[0006] Furthermore, the valve assembly includes a shut-off valve and a maintenance valve. Each set of non-corrosive medium connection pipelines includes a main connection pipeline. One end of the main connection pipeline is connected to a connecting pipe, and the other end is divided into a first pipeline and a second pipeline. A shut-off valve is provided on the main connection pipeline. The first pipelines of the two sets of non-corrosive medium connection pipelines are connected through the maintenance valve, and the second pipelines of the two sets of non-corrosive medium connection pipelines are connected through a differential pressure transmitter.

[0007] Furthermore, the connecting pipe is a corrosion-resistant metal pipe.

[0008] Furthermore, the isolation container is provided with a fluid exchange port for replacing and draining corrosive media solution or isolation fluid.

[0009] The beneficial effects of this utility model are as follows: 1) Reduced installation requirements: After being put into use, it can achieve single flange measurement, can measure on horizontal pipes, and no detection element needs to be inserted into the equipment; 2) Reduced measurement costs: It can replace instruments that use special materials for liquid contact measurement, greatly reducing measurement costs; 3) Real-time monitoring: It can monitor in real time and adjust the production process through the basic process control system in the plant, thereby achieving high-precision quality control of chemical products. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] In the diagram: 1. Flange pressure tapping element; 2. Corrosive medium connection pipeline; 3. Isolation container; 31. Connecting pipe; 32. Fluid exchange port; 4. Non-corrosive medium connection pipeline; 41. Main connection line; 42. First pipeline; 43. Second pipeline; 5. Maintenance valve; 6. Differential pressure transmitter; 7. Shut-off valve. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of protection of the present invention is not limited thereto.

[0013] like Figure 1As shown, a liquid density measuring device suitable for single-hole equipment or pipelines includes a flange pressure tapping element 1, two sets of corrosive medium connecting pipelines 2, two sets of isolation containers 3, two sets of non-corrosive medium connecting pipelines 4, a maintenance valve 5, a differential pressure transmitter 6, and a shut-off valve 7. The flange pressure tapping element 1 is located at the flange of the single-hole equipment or horizontal pipeline. The number of flange pressure tapping elements 1 is single, which can meet the pressure tapping of the positive and negative pressure sides of the differential pressure transmitter 6. One end of each of the two sets of corrosive medium connecting pipelines 2 is connected to the flange pressure tapping element 1. After the flange pressure tapping element 1 has a middle opening, it is connected to the corrosive medium connecting pipeline 2 through a semi-through-plate pagoda joint. Each set of isolation containers 3 contains a corrosive medium solution and an isolation liquid that are separated into upper and lower layers by different specific gravities. Each set of isolation containers 3 has a connecting pipe 31 at the top and bottom, and the connecting pipe 31 is a corrosion-resistant metal pipe. One connecting pipe 31 connects to the corrosive medium solution. A corrosive medium connection pipe 2 is connected to another connecting pipe 31, which is connected to an isolation liquid and a non-corrosive medium connection pipe 4. The non-corrosive medium connection pipe 4 is equipped with a valve assembly. Each isolation container 3 is equipped with a liquid replacement hole 32 for replacing and draining the corrosive medium solution or isolation liquid. The valve assembly includes a shut-off valve 7 and a maintenance valve 5. Each non-corrosive medium connection pipe 4 includes a main connection pipe 41. One end of the main connection pipe 41 is connected to the connecting pipe 31, and the other end is divided into a first pipe 42 and a second pipe 43. The main connection pipe 41 is equipped with a shut-off valve 7. The first pipes 42 of the two sets of non-corrosive medium connection pipes 4 are connected by the maintenance valve 5. The second pipes 43 of the two sets of non-corrosive medium connection pipes 4 are connected by a differential pressure transmitter 6. The maintenance valve 5 is only opened during maintenance. The dotted box in the figure represents one maintenance valve 5 and two shut-off valves 7. It can also be directly replaced with a three-valve group for use.

[0014] Measurement method: For the medium to be measured in the equipment or horizontal pipeline, an immiscible isolation liquid with a specific gravity difference is used. The medium solution and the isolation liquid are injected into the isolation container 3 through the liquid exchange hole 32. The device is connected. The pressure of the medium to be measured in the equipment or pipeline is transmitted to the isolation container 3 through the corrosive medium connection pipeline 2, and then to the high-pressure side and low-pressure side of the differential pressure transmitter 6 through the non-corrosive medium connection pipeline 4. The pressure difference is measured. The density is calculated as ρ=ΔP / gΔh, where Δh is the height difference between the two test points at the flange pressure tapping element 1. The medium density is then calculated. The medium concentration value can be obtained by referring to the liquid medium density and concentration comparison table.

Claims

1. A density measuring device suitable for liquids in single-hole equipment or pipelines, characterized in that, It includes a flange pressure tapping element (1) installed at a single-hole device or a horizontal pipeline flange, two sets of pressure-transmitting isolation containers (3), two sets of corrosive medium connection pipelines (2) for connecting one end of the flange pressure tapping element (1) and the two sets of isolation containers (3), and two sets of non-corrosive medium connection pipelines (4) for connecting the other end of the two sets of isolation containers (3) and the same differential pressure transmitter (6). The non-corrosive medium connection pipelines (4) are equipped with valve assemblies. Each set of isolation containers (3) contains a corrosive medium solution and an isolation liquid that are separated into upper and lower layers by different specific gravities. Each set of isolation containers (3) is equipped with a connecting pipe (31) at the upper and lower parts respectively. One end of the connecting pipe (31) at the upper and lower parts is connected to the corrosive medium solution or the isolation liquid respectively, and the other end is connected to the corrosive medium connection pipeline (2) or the non-corrosive medium connection pipeline (4).

2. The density measuring device for liquids in a single-hole device or pipeline as described in claim 1, characterized in that, The valve assembly includes a shut-off valve (7) and a maintenance valve (5). Each set of non-corrosive medium connection pipelines (4) includes a main connection pipeline (41). One end of the main connection pipeline (41) is connected to a connecting pipe (31), and the other end is divided into a first pipeline (42) and a second pipeline (43). A shut-off valve (7) is provided on the main connection pipeline (41). The first pipeline (42) of the two sets of non-corrosive medium connection pipelines (4) is connected through the maintenance valve (5), and the second pipeline (43) of the two sets of non-corrosive medium connection pipelines (4) is connected through a differential pressure transmitter (6).

3. The density measuring device for liquids in a single-hole device or pipeline as described in claim 2, characterized in that, The connecting pipe (31) is a corrosion-resistant metal connecting pipe.

4. The density measuring device for liquids in a single-hole device or pipeline as described in claim 1, characterized in that, The isolation container (3) is provided with a liquid exchange hole (32) for replacing and draining corrosive media solution or isolation liquid.

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